that is the repositories section for dependencies.. the section for plugins and buildscripts is in the
buildscripts{}
but to actually apply the plugin it needs a extra call
or you tell gradle via
settings.gradle.kts
that the specific id it is looking for is a specific maven coordinate (and the repsoitories)
(by default it looks for "$pluginId:$pluginId.plugin.gradle" or so)
then gradle will apply the plugin for you when you request it by id in the plugins block